Surface settlements caused by mechanised tunnelling in hard rock with heterogeneous tunnel face conditions – Empirical and numerical calculations using the example of Boßler Tunnel
نویسندگان
چکیده
An empirical and a numerical calculation model were developed to predict the surface settlements due EPB tunnelling in hard rock with heterogeneous face conditions. For this purpose, settlement TBM driving data from Boßler Tunnel considered. The launching area characterised by low overburden (z/D < 2) nature conservation at was examined. models calibrated against measured of first eastbound tube used subsequent westbound tube. prediction then compared actual during excavation From this, findings for future predictions similar ground conditions derived. It could be shown that both are suitable application investigated subsoil can successfully practice different phases project development. Zur Prognose der Oberflächensetzungen für EPB-Vortriebe Festgestein bei heterogenen Ortsbrustverhältnissen wurde am Beispiel des Boßlertunnels ein empirisches und numerisches Berechnungsmodell aufgestellt. Dazu wurden die Setzungsdaten, aus dem Vortrieb zuerst aufgefahrenen Oströhre vorlagen, sowie Vortriebsdaten Maschine berücksichtigt. Untersucht speziell Anfahrtsbereich mit einer geringen Überdeckung 2). Oberhalb Tunnels befindet sich diesem Bereich Naturschutzgebiet. Basierend auf den gemessenen Setzungen oberhalb Modelle kalibriert. Mit beiden Modellen dann Weströhre, nach aufgefahren wurde, prognostiziert. Die tatsächlichen anschließend ausgewertet prognostizierten gegenübergestellt. Daraus Erkenntnisse zukünftige Setzungsprognosen ähnlichem Baugrund abgeleitet. Es konnte gezeigt werden, dass beide Anwendung untersuchten geeignet sind unterschiedlichen Phasen Projektbearbeitung Praxis angewendet werden können.
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ژورنال
عنوان ژورنال: Geomechanik Und Tunnelbau
سال: 2021
ISSN: ['1865-7389', '1865-7362']
DOI: https://doi.org/10.1002/geot.202000038